Incandescent electric lamp



S. YUYAMA.

INCANDESCENT ELECTRIC LAMP.

APPLICATION FILED NOV, 30. I918.

Patented June 1, 1920.

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snrenzo YUYAMA, on NEW YORK, N. Y,

INCANDESGENT ELECTRIC LAMP.

Specification of Letters Patent.

Application filed November 30, 1918. Serial No. 284,826.

' To all whom it may concern Be it known that I, Srnonzo YUYAMA, a subject of the Emperor of Japan, and a resident of New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in to provide an electric lamp designed to be employed for general use to supply light,

and which is so constructed that when lighted its luminousrays will be distributed on a longitudinal plane as well as in a downward direction, besides being distributed in: lateral and upward directions; thereby, causing a greater area to be illuminated than is incident to the ordinary forms of electric lamps of this class having'vertically disposed winding of the filament. The invention resides mainly in providing a frame on an insulating stem arranged in a transparent bulb with leading-in wires projecting from the stem, and on the frame is strung a filament in a fashion to provide two spaced substantially inverted V-shaped members as well as providing three spaced members disposed transversely of the base portions of the inverted Vshaped members, the ends of the filament being connected to the leading-in wires. When these members of the filament are heated to an incandescent state as is commorf with lamps of this class the glow will be distributed by the transverse members in a lateral as well as in a downward direction, while the glow is distributed in lateral and upward directions by the inverted V-shaped members; thus providing an unusual volume of luminosity.

A further object of the invention is to provide an incandescent electric lamp of a simple and efiicient construction which is adapted to be made in any desired shape and size.

\Vith these and other objects in view, the invention will be hereinafter more particularly described with reference to the accompanying drawing forming a part of this specification in which similar characters of reference indicate corresponding parts in all the views, and will then be pointed out in the claims at the end of the description.

In the drawing, Figure 1 is an elevation of one form of incandescent electric lamp embodying'my invention.

Fig. 2 is an enlarged perspective View showing the winding of the filament on its frame together with associate parts of the interior of the lamp, and

Fig. 3 is an enlarged detail sectional view taken on the line 33 of Fig. 1.

The lamp has a transparent bulb, as 10,

which may be circular, elliptic or other shape transversely as well as being somewhat pear-shaped or suitably tapered upwardly in a converging direction, and on the apex ofthe bulb may be a plug, as 11, of a form common to this form of lamp.

In the plug 11 is mounted one end of a stem 12 which may be made of glass or other insulating material, and this stem is disposed vertically downward centrally of the interior of the bulb as well as being of a length so that its second end extends in Patented June 1, man. I

spaced proximity to the base or'lower end" of the bulb 10. The upper part of the insulating stem 12 may be enlarged, as at- 13, while the lower end of the stem may terminate with a ball or knob, as 14, and carried by theenlarged part 13 of the stem are two spaced leading-in wires or terminals 15 and 16. These leading-in wires are of lengths so that they extend some distance into the bulb 10, besides being of lengths so that their end portions interiorly of the bulb are disposed in opposite directions rightangularly on alinement from the enlarged part 13 of the insulating stem, and the free end parts of the wires mayalso be bent downwardly, as at 17 and 18.

On the insulating stem 12 below the enlarged part 13 is a frame 19. This frame may be of any suitable type, though the frame is preferably composed of an upper supporting member 20 and a lower supporting member 21. The upper member has two arms 22 and 23 which protrude on alinement in opposite lateral directions from an insulating sleeve or annular flange, as 24, provided on the stem 12 in proximity to its enlarged part 13. The arms 22 and 23 may extend toward the bent ends 17 and 18 of the leading-in wires 15 and 1G, and these arms are preferably on alinement with the free ends of the bent parts of the leadingin wires. The combined lengths of the arms 22 and 23 may also correspond to each of the spaces between the arms and the bent ends 17 and 18 of the leading-in wires. The

lower supporting member 21 of the frame has a number of arms 25, 26, 27, 28, 29, 30

be circular by making all of the arms of similar lengths. On the free end of each of the arms 22 and 23 of the upper supporting member 20 of the frame may be a loop or hook, as 31, while on the free end of each of the arms 25, 26, 27', 28, 29, 30 of the lower supporting member 21 of the frame maybe a loop or hook 32, and strung on the frame as thus provided is a filament 33. v

The filament 33 may be of tungsten or other material ordinarily employed in lamps of this class so as to receive the current from the leading-in wires for being heated in the usual manner to produce the usual incandescence, and the filament is arranged on the frame 19 to provide interiorly of the bulb two spaced inverted V-shaped members, as

34.- and 35, as well as providing three spaced members, as 36, 37, 38, transversely of the bases of the inverted V-shaped members.

This is accomplished by connecting, as at 39, one end of the filament 33 to the bent end 17 of the leading-in-wire 15 and stringing the.

filament over the hook 32 of the arm 26 of the frame 19, after which the filament is passed over the hook of the arm 25 of the frame, and the transverse member 36 of the filament will be provided. From the arm 25 short, spaced pairs of side and intermediate the filament is disposed upwardly over the hook 3 1' of the arm 22 of the frame, and the filament is directed downwardly over the hook 32 of the arm 28 to provide the inverted V-shaped member 34:. The transverse member 37 of the filament is provided by passing the filament to and over the hook of the arm 27 of the frame; The filament is then disposed upwardly overthe hook of the arm 23 and by being passed downwardly over the hook 32 of the arm 30 the inverted V-shaped member 35 is provided. From the arm 30 the filament is passed to and overthe hook 32 of the arm 29 of the frame to provide the transverse member 38 of the fila- 'ment, and from this arm the filament is disposed upwardly and its second end is connected, at 40, to the ,bent end 17 of the leading-in wire 18. Thus by providing the transverse members 36, 37,38 of the filament the glow therefrom when heated to an incandescence will be distributed on a lon- ,gitudinal plane as well as being distributed .{in a downward direction, while the inverted vV-shaped members 3 1 and 35 will cause the glow to be distributed laterally and inup" ward directions. The volume of light from the lamp will thereby be spread over a greater area than is incident to the forms of lamps at present in use.

-In the foregoing description I have embodied the preferred form of my invention,

but I do not wish to be understood aslimiting myself thereto, as I am aware that modifications may be made therein without departing from the principle or sacrificing any of the advantages of this invention,

therefore I reserve to myself the right to wires, spaced separate arms protruding radially from the lower part of the stem, and afilament strung on the ends of the arms in a fashion to provide two. spaced inverted V-shaped members and three spaced transverse members disposed at the bases of the V-shaped members, the ends of the filament being connected to the ends of the leadingin wires.

2. An electric lamp including a trans; parent bulb with an insulating stem carrying leading in wires whose ends extend laterally in opposite directions from the stem, a pair of arms protruding in opposite lateral directions from the upper part of. the stem beneath the leading-in wire end portions, said pair of arms being relatively arms protruding radially from the lower part of the stem, and a filament strung from the end of one leading-in wire downwardly to the end of one lower side arm, then across to the adjacent side arm, then upwardly over the end 'of one, of the upper relatively short arms, downwardly to one of the intermediate arms, across to the other intermediate arm, upwardly over the end of the other relatively short upper arm, downwardly to one of the lower side arms at the other side of the stem, and then around" the other adjacent side arm and upwardly to the other leading-in wire, whereby two inverted V-shaped members are provided with three spaced transverse members at the bases thereof, substantially as described.

\ wThis specification signed and witnessed November A. D. 1918.

this 29th day of r i SHIGEZO YUYAMA.

Witnesses:

W. NASH, GEORGE F BENTLEY. 

